Siemens A30031 fault code meaning
Siemens / A30031
Series: G110M, G115D, G120-CU250S-2, G120C, G120D, G120X, G120XA
Power unit: Hardware current limit response for phase U
converter
Meaning: Hardware current limiting has responded in phase U. Pulses in this phase are inhibited for one pulse period. - Incorrect closed-loop control parameter settings. - Fault in the motor or power cable. - The power cable exceeds the maximum permissible length. - The motor load is too large. - The power unit is damaged.
Possible causes
Source: SINAMICS G110M P741; SINAMICS G115D P796; SINAMICS G120, control unit CU250S-2 P1022; SINAMICS G120C P711; SINAMICS G120D control unit CU240D- 2_CU250D- 2 P920; SINAMICS G120X converter P1410; SINAMICS G120XA PN converter P1320
Series: G120-CU240B-E-2
Power unit: Hardware current limit response for phase U
converter
Meaning: Hardware current limiting has responded in phase U. Pulses in this phase are inhibited for one pulse period. - Incorrect closed-loop control parameter settings. - Fault in the motor or power cable. - The power cable exceeds the maximum permissible length. - The motor load is too large. - The power unit is damaged. Note: If hardware current limiting responds in phase U, V or W of the power module, warning A30031 is always output.
Possible causes
Source: SINAMICS G120 Control Unit CU240B_E-2 P689
Series: S200
Power unit: hardware current limit for phase U
servo drive
Meaning: The hardware current limit for phase U has been activated. Pulses in this phase are blocked for one pulse period. - Incorrect closed-loop control parameter settings. - Faulty motor or power cable. - Power cable exceeds the maximum permissible length. - Motor load too large. - Power unit damaged. Note: Alarm A30031 is always output if the hardware current limit for phase U, V, or W in the inverter is activated. System messages 11.3 Faults and alarms SINAMICS S200 Spindle Drive 414 Operating Instructions, 06/2026, FW V6.7, A5E54447397B AA
Possible causes
Source: SINAMICS S200 Spindle drive P416
Series: V90
Hardware current limit for phase U triggered
servo drive
Meaning: Message class: Power electronics fault (5). Hardware current limiting for phase U has responded. Pulses in this phase are inhibited for one pulse period. Incorrect closed-loop control parameter settings. Faulty motor or power cable. The power cable exceeds the maximum permissible length. The motor load is too large. The power unit is damaged. Note: Alarm A30031 is always output if hardware current limiting responds in phase U, V, or W of the power unit. Alternatively, perform motor data detection.
Possible causes
Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P396